code: def encode_config(proxy_url, allowed_email_subdomain, admin_emails):
      combined_string = f"proxy_url={proxy_url}&accepted_email_subdomain={allowed_email_subdomain}&admin_emails={admin_emails}"
      return base64.b64encode(combined_string.encode("utf-8")).decode(
          "utf-8"
      )
  
file_path: litellm/ui/admin.py
imports: from dotenv import load_dotenv
  import streamlit
  import base64, os, json, uuid, requests
label_desc: Use image node_id 1 for calling a global function with example usage: encode_config(proxy_url, allowed_email_subdomain, admin_emails) and returns: base64